$ git clone -n https://src.fedoraproject.org/rpms/python-httpx.git /var/lib/mock/f45-build-31000-649/root/chroot_tmpdir/scmroot/python-httpx
Cloning into '/var/lib/mock/f45-build-31000-649/root/chroot_tmpdir/scmroot/python-httpx'...
$ git fetch origin 5047ae148baf51dc44290fee83f3348325f175b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-httpx
 * [new ref]         5047ae148baf51dc44290fee83f3348325f175b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5047ae1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild